Shinjō weather in August

In August, Shinjō sees average daytime highs of 27°C and overnight lows near 20°C, with 157 mm of rain across 15 wet days and about 13.5 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 26°C by the end. The sky is clear or mostly clear about 19% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 14 hours at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Shinjō's 5th-clearest and 11th-windiest month. For the whole year in context, see Shinjō's year-round climate.

Daytime high
27°
1st warmest
Overnight low
20°
12th coldest
Rainfall
157 mm
15 wet days
Daylight
13 h 30 min
4:57 AM – 6:29 PM
Cloud cover
69%
5th clearest
Wind
7 km/h
11th windiest
Solar energy
4.34 kWh/m²
Travel score
5.6
out of 10

Shinjō is city in Yamagata Prefecture, Japan.

Density
185/km²
people per km²
Founded
1949

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 28°C in the first days to 26°C by the end.

A typical August day in Shinjō reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 32°C. Set against its neighbours, August runs about 2°C warmer than July and about 4°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12821
22821
32821
42821
52821
62821
72821
82821
92821
102821
112821
122821
132821
142821
152821
162721
172720
182720
192720
202720
212720
222720
232720
242720
252720
262720
272620
282619
292619
302619
312619

How August really feels in Shinjō

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Shinjō weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°13623.423.89.60.0
Feb / -3°1001918.910.50.0
Mar / -1°11818.713.111.70.6
Apr13° / 10414.32.5133.3
May19° / 10°10612.7014.15.6
Jun23° / 15°12313014.76.0
Jul26° / 19°20117.1014.45.4
Aug27° / 20°15715013.55.6
Sep23° / 16°13414.1012.35.8
Oct17° / 10°13114.20114.9
Nov11° / 11917.93.89.92.2
Dec / -1°14422.616.99.30.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13466
23565
33664
43664
53664
63664
73664
83664
93664
103664
113664
123565
133664
143664
153565
163565
173664
183664
193565
203664
213664
223664
233664
243565
253565
263565
273565
283466
293466
303466
313268

Chance of precipitation in August

Any precipitation

Shinjō gets around 157 mm of rain over 15 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
143
243
343
443
543
643
744
845
945
1046
1147
1247
1348
1449
1550
1650
1751
1851
1951
2051
2151
2251
2351
2451
2551
2650
2750
2850
2949
3049
3149

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the oppressive band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1041235481
2041234491
3041233501
4031233511
5031332511
6031332511
7031331521
8041331511
9041431501
10041432501
11041432491
12041432481
13041533471
14041533471
15041534451
16051634441
17051635431
18151635421
19161735411
20161736391
21161836381
22171936371
23171937351
24182037331
25182138321
26182238301
27192338281
28192438271
291102539251
301102639231
311112739221

Wind in August

Winds average 7 km/h in August.

Across August, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 hours at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over August. Sunrise moves from 4:44 AM to 5:11 AM, and sunset from 6:46 PM to 6:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.04:446:46
214.04:446:45
314.04:456:44
413.94:466:43
513.94:476:42
613.94:486:41
713.84:496:40
813.84:506:39
913.84:516:37
1013.74:526:36
1113.74:536:35
1213.74:546:34
1313.64:546:33
1413.64:556:31
1513.64:566:30
1613.54:576:29
1713.54:586:27
1813.44:596:26
1913.45:006:24
2013.45:016:23
2113.35:026:22
2213.35:036:20
2313.35:046:19
2413.25:056:17
2513.25:066:16
2613.15:066:14
2713.15:076:13
2813.15:086:11
2913.05:096:10
3013.05:106:08
3112.95:116:07

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.34 kWh/m².

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 5.25 kWh/m² in May across the year — August's 4.34 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.6Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.5Bright
124.4Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.0Bright
284.0Bright
294.0Bright
304.0Moderate
314.0Moderate
Planning a trip in August

Hazard calendar for Shinjō

In seasonPeak

In August, Shinjō sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Shinjō sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Shinjō?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.6
Sightseeing
3rd-best month of the year
5.8
Beach & pool
1st-best month of the year

August is a reasonable time to visit Shinjō for sightseeing.

What to pack for Shinjō in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Shinjō sees daytime highs around 27°C and nights near 20°C. Pack light clothes and rain gear. About 15 days see rain.

light clothesrain gear

Sea temperature near Shinjō in August

The nearest coast averages about 26°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 55 km away) is warmest in August at about 26°C and coldest in March near 9°C.

It's comfortable for a long swim from Jun 26 to Oct 25 — about 4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar9Bracing
Apr10Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct21Refreshing
Nov18Cool
Dec14Bracing

UV index in Shinjō in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Shinjō peaks around August 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 18UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul7High
Aug9Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Shinjō in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Shinjō is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun15Moderate
Jul13Moderate
Aug11Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Shinjō?

Shinjō sits at 38.8°N, 140.3°E, 99 m above sea level, in Japan. The nearest listed city is Obanazawa, 19 km away.

Topography around Shinjō

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Shinjō.

Within 3 km, the terrain around Shinjō has only modest variations in elevation — a maximum elevation change of 203 m around an average of 114 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,190 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,215 m.

The land around Shinjō is covered by cropland (43%), trees (28%) and artificial surfaces (26%) within 3 km, trees (74%) and cropland (20%) within 16 km, and trees (69%) within 80 km.

3 km
203 m
16 km
1,190 m
80 km
2,215 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Obanazawa 19 km · Murayama 34 km · Shonai 36 km · Higashine 37 km · Yachi 37 km · Tsuruoka 42 km · Sakata 42 km · Sagae 43 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Shinjō (38.7586°, 140.3008°, elevation 99 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).